Question

At Statsville High School, 125 students are taking university-preparation Science courses. Of these students, 64 take Biology, 40 take Chemistry, and 51 take Physics. There are 12 students who take both Chemistry and Physics, 11 who take both Chemistry and Biology, and 8 who take all three courses. How many students take just Physics and Biology? Illustrate your answer with a Venn diagram.

Answer 1

$$125=53-x+25+39-x+3+4+x+8$$

$$x=7$$

7 students take just Physics and Biology.